they're going to look at the test results and work their way backwards at the cia, trying to figure out, okay, if this was the test, how did they get there? do they really have the expertise to do it themselves or did they get help and perhaps maybe not china, maybe iran, maybe pakistan, a lot of concern that iranian scientists have traveled to north korea and that they are sharing their expertise and that, of course, takes this nuclear threat right back to iran, potentially. >> barbara starr, tim lister, thank you, both, very much. i appreciate it. >>> up next, this fantastic story, this homeless man finds something shiny in a cup carrying loose change. and what happens next means the world to one woman. >>> a kansas city woman's good deed nearly broke her heart. she accidentally dropped her engagement ring into this cup, this homeless man was holding when she was giving him loose change. she thought she would never see the ring again. she was wrong. betsy webster from cnn affiliate kctv has this amazing story. >> spare change today, sir. god bless. spare some change today, sir? thank